PORE CONTROL TYPE DEEP BED FILTER

摘要

PURPOSE: A pore control type deep bed filter is provided which presses filter medium efficiently, expands filtration space of filter layer, has long filtration duration and less cleaning frequency and easily copes with water quality change of influent. CONSTITUTION: The pore control type deep filter comprises a filter tank(100) at which inflow port(101) of raw water and discharge port(102) of filtered water are installed; a filter layer formed by fiber filter media(30) densely installed in the filter tank; a pore control pipe(50) which is a flexible tube injected between the filter layers and expanded or contracted by fluid, wherein the filter layer comprises fiber bundles having different length installed along a length direction of the filter tank, and deep filter layers having different pore density formed longitudinally inside the filter tank(100).